Goodrich a



(No Model.)

G. A. MAYO. CRANK SHAFT SUPPORT PUB. SEWING MACHINES.

Patent-ed Oct. 3, 1882.

UNTTED STATES PATENT erica GOODRIOH A. MAYO, or ERIE, PENNSYLVANIA, AssteNoR To GEORGE H. NOBLE, OF sAME PLAOE.

t'JRANKsHAi-'T SUPPORT FOR SEWING-fNlACHINES. A

SPEFICATION forming part of Letters Patent No. 265,334, dated October 3, 1882,

(No model.)

To all whom it may concern Be it known that I, GOODEICH A. MAYO, a citizen ofthe United States, and a resident of Erie, in the county of Erie and State of Pennsylvania, have invented a new and useful Improvement in Crank-Shaft Supports for Sew. ing-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accom- Io panying drawings and the letters or figures of reference marked thereon.

The objectofthe invention is to make a hanger for the crankshaft, balan ce-wheel, and drivewheel which can be cheaply constructed and so adjusted as to accurately center the said parts and make them run true Without the usual care and attention in iitting up the/hanger and attaching the same to the frame-work.

My device is shown in the accompanying 2o drawings, as follows:

Figure l is a side elevation of a sewing-inachine frame-Work with the balance-wheel and crank-shaft mounted thereon by my device. Fig. 2 is a horizontal section through my improved hanger on the line .t in Fig. 1. Fig.

3 is an elevation view ofthe frame of the hanger.

Fig. 4 is a top or edge view of the adjustable part ofthe hanger, the ends being thrown into section.

The parts shown are indicated by letters of reference, as follows:

A is the frame ofthe machine.

B B' is the hanger. l

C C are the balance-wheel and drive-wheel.

D is the crank-shaft.

d d are the journal-points on which the Wheel and crank are pivoted. i

..b b I; b are points at which the hanger may be attached to the frame or to the side of a sup- 40 porting-cabinet, as required.

The hanging device proper consists ot' the frame B (seen in elevation in Fig. 3) and the strap B', (seen in Fig. 4,) which is attached to the frame B by the screws E E. One ot' the' centerings d is on the frame B and thel other is on the strap B', and to secure a perfect cen-- tering of the rotating parts the strap must be so adjusted as to bri-ng the point d on it direct-` ly opposite the point d on the frame B. The

l very considerably changed, and as the heads of the screws E E are large enough to form a good bearing upon the face of the strap they act as clamps to hold the strap in place when they are iirmly screwed up. When it is attempted to adjust the Centex-ings of the rotating parts by having the holes in which they set properly drilled inaccuracies will occur by reason of deviation of the drill while passing through the iron, even where the utmost care is taken.

By my device thc work of litting up will require no particular care, for the position of the holes may vary considerable without any bad eden-as, for instance, in Fig. 3 the holes e' c', into which the screws E E set are shown as out ot'line, as if carelessly drilled, but such inaccuracy does no harm, for the large holes c e in the strap B' permit it to be so adjusted as to bring the centering'piu d on the strap exactly opposite the pin d on the frame B.

I am aware that sewing-machines have been provided with crank-shaft supports attached to the frame, but am not aware that any have been provided with a strap having a bearing for one end of the shaft and elongated openings providcd with holding-screws for adjust` ing the strap to center the shaft.

That I claim as new isl. The combination, with the hanger-frame B, ofthe detachable strap B', having holes e e, through which pass the screws by which it is attached to the frame B, larger than the shanks of said screws, substantially asand for the purposes mentioned.

2. The combination, with the supportingframe, the drive-Wheel, and crank-shaft of a sewing-machine, of the hanger-frame B, having thereon one ot' the centerings or journals et' said wheeland crank-shaft, and the detachable strap B', having thereon the other ot' said centerings or journals, said strap being provided with means, substantially as shown, `whereby it can be adjustably attached to the jiraine B, substantially as .and I'or the purposes mentioned.

"In testimony that I claim the foregoing I have hereunto set my hand. l

Witnesses W. R. EDELEN, W. S. BROWN.

GOODRIGH A. MAYO. A

IOO 

